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Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice

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The oculomotor resonance effect in spatial-numerical mapping.

Andriy Myachykov¹, Angelo Cangelosi², Rob Ellis³

¹Department of Psychology, Northumbria University, Newcastle-upon-Tyne, United Kingdom; Centre for Cognition and Decision Making, National Research University Higher School of Economics, Moscow, Russian Federation.

Acta Psychologica

|September 24, 2015

Summary

This summary is machine-generated.

We found that the brain automatically links numbers to space during auditory processing. This automatic Spatial-Numerical Association of Response Codes (SNARC) effect influences gaze direction, showing a bias towards the left for smaller numbers.

Keywords:

Attention Embodied cognition Eye movements Ocular drift Oculomotor resonance SNARC

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Area of Science:

Cognitive Psychology
Neuroscience
Computational Cognition

Background:

The Spatial-Numerical Association of Response Codes (SNARC) effect describes the influence of spatial representations on number processing.
Previous research has primarily focused on visual number presentation, leaving the automaticity in auditory number processing less understood.

Purpose of the Study:

To investigate the automatic Spatial-Numerical Association of Response Codes (SNARC) effect in auditory number processing.
To examine the spatial characteristics of ocular drift during and after auditory number presentation.

Main Methods:

Two experiments were conducted measuring ocular drift at central fixation.
Auditory number presentation was used, with and without a concurrent saccadic task.
Spatial characteristics of gaze adjustments were continuously monitored.

Main Results:

Spontaneous, magnitude-dependent gaze adjustments were observed, supporting a spatially oriented mental number line.
A small-number/left-lateralized bias was identified in these fixation adjustments.
The effect was biphasic, appearing briefly around lexical access and more robustly around subsequent number onset.

Conclusions:

The findings suggest a two-step sensorimotor mapping mechanism for numbers and space.
This involves an initial bottom-up activation followed by a top-down, horizontal SNARC.
Results inform theories of number processing and simulation-based cognition by highlighting oculomotor resonance.